Looking at the specifications for a Powerflex 755 Drive running in torque mode it lists the performance as
+/- 2% , 2500 rad/s with encoder
+/- 5% , 600 rads/s without encoder
I understand that +/-% is percent of rated torque of the drive, but the radians/second qualifier is foreign to me.
Asking if a mechanical guru can explain how does it come into play?